Patent US6956418B2 successfully refreshed from Google Patents.
US6956418B2
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Delay locked loop device
Assignee: SK Hynix Inc
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Filing: 2003-12-31
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Granted: 2005-10-18
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Expires: 2023-12-31
Abstract
Abstract A delay locked loop device includes a first delay line for receiving an external clock signal and a first delay control signal to generate a first internal clock signal; a second delay line for receiving the external clock signal and a second delay control signal or the first delay control signal to generate a second internal clock signal; a first delay control block for receiving the external clock signal to generate the first delay control signal; a second delay control block for receiving the external clock signal to generate the second delay control signal; and a phase detecting block for receiving the first internal clock signal and the second internal clock signal to generate the on-off signal by comparing a phase of the first internal clock signal with a phase of the second internal clock signal.
Inventors
- 👤 Jong-Tae Kwak
- 👤 Seong-Hoon Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:12
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/06; H03L7/08; H03L7/07; H03L7/0802; H03L7/081; H03L7/0812; H03L7/0814; H03L7/0816; H03L7/0818; H03L7/085; H03L7/087
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
138 words
A delay locked loop device comprising: a first delay line for receiving an external clock signal and a first comparative signal to generate a first internal clock signal; a second delay line for receiving the external clock signal and a second comparative signal or a first delay control signal to generate a second internal clock signal; a first delay control block for receiving the external clock signal to generate a first duty controlled internal clock signal; a second delay control block for receiving the external clock signal to generate a second duty controlled internal clock signal; and a phase detecting block for receiving the first internal clock signal and the second internal clock signal to generate the on-off signal by comparing a phase of the first internal clock signal with a phase of the second internal clock signal.
Claim 2
Dependent Claim
138 words
A delay locked loop device comprising: a first delay line for receiving an external clock signal and a first comparative signal to generate a first internal clock signal; a second delay line for receiving the external clock signal and a second comparative signal or a first delay control signal to generate a second internal clock signal; a first delay control block for receiving the external clock signal to generate a first duty controlled internal clock signal; a second delay control block for receiving the external clock signal to generate a second duty controlled internal clock signal; and a phase detecting block for receiving the first internal clock signal and the second internal clock signal to generate the on-off signal by comparing a phase of the first internal clock signal with a phase of the second internal clock signal.
Claim 3
Dependent Claim
33 words
The delay locked loop device as recited in claim 1 , wherein the second delay control block is disabled in response to the on-off signal when the delay locked loop device is locked.
Claim 4
Dependent Claim
34 words
The delay locked loop device as recited in claim 1 , wherein the phase detecting block generates a weight signal in response to the first internal clock signal and the second internal clock signal.
Claim 5
Dependent Claim
42 words
The delay locked loop device as recited in claim 3 , wherein the first delay control block generates the first duty controlled internal clock signal in response to the first internal clock signal, the second internal clock signal and the weight signal.
Claim 6
Dependent Claim
42 words
The delay locked loop device as recited in claim 4 , wherein the second delay control block generates the second duty controlled internal clock signal in response to the first internal clock signal, the second internal clock signal and the weight signal.
Claim 7
Dependent Claim
48 words
The delay locked loop device as recited in claim 1 , wherein the second delay line includes a second delay line control unit for receiving the first delay control signal or the second comparative signal to generate a second delay control signal and a second delay enable signal.
Claim 8
Dependent Claim
78 words
The delay locked loop device as recited in claim 6 , wherein the second delay line further includes: a coarse delay line for coarsely delaying the external clock signal in response to the second delay control signal and the second delay enable signal; and a fine delay line for finely delaying the coarsely delayed external clock signal in response to the second delay control signal and the second delay enable signal to generate the second internal clock signal.
Claim 9
Dependent Claim
64 words
The delay locked loop device as recited in claim 1 , wherein the first delay line includes a first delay line control unit for receiving the first comparative signal to generate a first delay enable signal and a first delay delay control signal and to provide the first delay control signal to the second delay line when the delay locked loop device is locked.
Claim 10
Dependent Claim
78 words
The delay locked loop device as recited in claim 8 , wherein the first delay line further includes: a coarse delay line for coarsely delaying the external clock signal in response to the first delay enable signal and a first delay control signal; and a fine delay line for finely delaying the coarsely delayed external clock signal in response to the first delay enable signal and a first delay control signal to generate the first internal clock signal.
Claim 11
Dependent Claim
106 words
The delay locked loop device as recited in claim 5 , wherein the second delay control block includes: a direct phase detector for receiving the external clock signal and a delay modeled internal signal to generate the second comparative signal; a delay model for receiving the second duty controlled internal clock signal to generate the delay modeled internal signal by delaying the second duty controlled internal clock signal during a predetermined modeled delay time; and a phase mixer for receiving the first internal clock signal, the second internal clock signal, the on-off signal and the weight signal to generate the second duty controlled internal clock signal.
Claim 12
Dependent Claim
103 words
The delay locked loop device as recited in claim 5 , wherein the first delay control block includes: a direct phase detector for receiving the external clock signal and a delay modeled internal signal to generate the first comparative signal; a delay model for receiving the first duty controlled internal clock signal to generate the delay modeled internal signal by delaying the first duty controlled internal clock signal during a predetermined modeled delay time; and a phase mixer for receiving the first internal clock signal, the second internal clock signal and the weight signal to generate the first duty controlled internal clock signal.
Claim 13
Dependent Claim
79 words
The delay locked loop device as recited in claim 3 , wherein the phase detecting block includes: a mixer controller for generating the on-off signal and the weight signal in response to a phase detecting signal; and a phase detector for generating the phase detecting signal in response to the first internal clock signal and the second internal clock signal by comparing the phase of the first internal clock signal with the phase of the second internal clock signal.
References Cited (Backward Citations)
US6148038A
Cited
US6483871B1
Cited
US6388485B2
Cited
US6445231B1
Cited
US6748549B1
Cited
US6373301B1
Cited
US6680635B2
Cited
US6642760B1
Cited
US6677792B2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2008-10-17 | 2009-04-18 | 2009-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-10-17 | 2013-04-18 | 2013-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-10-17 | 2017-04-18 | 2017-10-18 | $7700.00 | Window Closed / Lapsed |